JP6809953B2 - Supply system, supply method and billing device - Google Patents

Description

The present invention relates to a supply system, a supply method and a billing device.

There is a technology for making sherbet ice (ice slurry) used to maintain the freshness of marine products. For example, Patent Document 1 discloses a technique for producing and storing seawater sherbet ice.

JP-A-2007-278667 Japanese Unexamined Patent Publication No. 2008-57927 Japanese Unexamined Patent Publication No. 2010-169322 JP-A-2015-224815

In order to supply ice to the purchaser and charge for it, it is necessary to know the exact amount of ice supplied. When crushing ice cubes and supplying the crushed ice to the purchaser, the weight of each ice cube is known in advance. Therefore, by counting the number of crushed ice cubes, the ice cubes can be crushed. You can accurately grasp the supply amount. On the other hand, in the case of sherbet ice, it is desirable to pump it through the supply pipe by utilizing its fluidity. However, since the sherbet ice flowing through the supply pipe is a solid-liquid two-phase fluid in which solid (ice particles) and liquid (water) are mixed, general-purpose flowmeters such as electromagnetic type, impeller type, positive displacement type, and vortex type can be used. , It is difficult to measure the flow rate of solid-liquid two-phase fluid. Some electromagnetic flowmeters and positive displacement flowmeters that can measure the flow rate of solid-liquid two-phase fluids are on the market, but those that can handle large flow rates are expensive, so they are practical from the viewpoint of introduction cost. It is difficult to serve.

Further, if the sherbet ice is not supplied for a long time, the sherbet ice in the supply pipe will melt. In this case, immediately after starting the sherbet ice supply pump, water (seawater in which ice particles are melted) flows out from the supply port. Therefore, when measuring the amount of sherbet ice supplied immediately after starting the sherbet ice supply pump, the amount of water initially flowing out from the supply port is also measured as the amount of sherbet ice supplied, and the exact amount of sherbet ice can be measured. Cannot supply to the purchaser.

Therefore, an object of the present invention is to provide a technique for improving the accuracy of measuring the supply amount of a solid-liquid two-phase fluid.

In order to solve the above problems, the following means were adopted. That is, the supply system of the present invention measures the temperature of the storage tank that stores the solid-liquid two-phase fluid, the pipe that is connected to the storage tank and the solid-liquid two-phase fluid flows in from the storage tank, and the fluid that flows through the pipe. When the measuring unit, the supply means for supplying the solid-liquid two-phase fluid in the pipe to the outside, and the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started, It includes a measuring unit that starts measuring the supply amount of the solid-liquid two-phase fluid supplied to the outside. According to the supply system of the present invention, the supply amount of the solid-liquid two-phase fluid is measured when the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started. By starting, it is avoided that the supply of solid-liquid two-phase fluid includes the amount of melted liquid. Therefore, the accuracy of measuring the supply amount of the solid-liquid two-phase fluid can be improved.

In the supply system of the present invention, at least a part of the pipes is arranged in the vertical direction, and the measuring unit may measure the temperature of the fluid flowing through the pipes arranged in the vertical direction. According to the supply system of the present invention, since the fluid flows vertically in the pipe, the solid concentration distribution of the fluid flowing through the pipe becomes constant, and the temperature of the fluid flowing through the pipe can be accurately measured.

In the supply system of the present invention, the pipe has a first pipe and a second metal pipe, the first pipe is connected to the storage tank, the second pipe is connected to the first pipe, and the measuring unit is the first. 2 The temperature of the fluid flowing through the pipe may be measured by measuring the surface temperature of the pipe. According to the supply system of the present invention, the amount of the solid-liquid two-phase fluid supplied when the surface temperature of the second pipe is lower than the predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started. Measurement can be started.

The supply system of the present invention includes a second pipe and a heat insulating material covering the measuring unit, and the measuring unit is designated by the measuring unit after a predetermined time has elapsed from the start of supplying the solid-liquid two-phase fluid to the outside. When a temperature lower than the temperature is detected, the measurement of the supply amount of the solid-liquid two-phase fluid supplied to the outside may be started. The supply system of the present invention includes a second pipe and a heat insulating material covering the measuring unit, and the measuring unit has a temperature lower than a predetermined temperature after the solid-liquid two-phase fluid is started to be supplied to the outside. After that, when the measuring unit detects a temperature above the specified temperature and then the measuring unit detects a temperature lower than the specified temperature, the measurement of the supply amount of the solid-liquid two-phase fluid supplied to the outside is started. You may. According to the supply system of the present invention, the supply amount of the solid-liquid two-phase fluid is not affected by the solid-liquid two-phase fluid remaining in the second pipe before the supply of the solid-liquid two-phase fluid is started. Can be started to measure.

The present invention can also be specified as a supply method. That is, the present invention includes a storage tank that stores a solid-liquid two-phase fluid, a pipe that is connected to the storage tank and into which the solid-liquid two-phase fluid flows from the storage tank, and a measuring unit that measures the temperature of the fluid flowing through the pipe. It is a supply method in a supply system including, and after the supply step of supplying the solid-liquid two-phase fluid in the pipe to the outside and the supply of the solid-liquid two-phase fluid to the outside are started, the measuring unit has a predetermined temperature. When a lower temperature is detected, a measurement step for starting measurement of the supply amount of the solid-liquid two-phase fluid supplied to the outside is provided. According to the supply method of the present invention, the supply amount of the solid-liquid two-phase fluid is measured when the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started. By starting, it is avoided that the supply of solid-liquid two-phase fluid includes the amount of melted liquid. Therefore, the accuracy of measuring the supply amount of the solid-liquid two-phase fluid can be improved. The present invention can also be specified as a billing device.

According to the present invention, it is possible to provide a technique for improving the accuracy of measuring the supply amount of a solid-liquid two-phase fluid.

FIG. 1 is a diagram showing a schematic configuration of a supply system according to an embodiment. FIG. 2 is a diagram showing an operation flow of the sherbet ice supply system according to the embodiment.

Hereinafter, the sherbet ice supply system according to the present embodiment will be described with reference to the drawings. The configuration of the following embodiments is an example, and the supply system of the present application is not limited to the configuration of the embodiment.

《Supply system》
FIG. 1 is a diagram showing a schematic configuration of a sherbet ice supply system 1 according to the present embodiment. The supply system 1 of the embodiment includes a storage tank (supply tank) 2, a differential pressure gauge 3, a supply pipe 4, a supply pump 5, a metal pipe 6, a supply valve 7, a supply port 8, and a surface thermometer. 9, a control device 10, and a purchase billing device 11 are provided. The supply system 1 may be configured as a supply device. Further, the storage tank 2, the differential pressure gauge 3, the supply pipe 4, the supply pump 5, the metal pipe 6, the supply valve 7, the supply port 8, the surface thermometer 9, and the control device 10 may be configured as the supply device. In this case, the supply system 1 includes a storage tank 2, a differential pressure gauge 3, a supply pipe 4, a supply pump 5, a metal pipe 6, a supply valve 7, a supply port 8, a surface thermometer 9, and a control device 10. It includes a purchase billing device 11. Further, the supply system 1 may be configured as a billing device.

The storage tank 2 is an open tank and stores sherbet ice produced by an ice making device. Sherbet ice is made using at least one of fresh water and seawater, or seawater diluted with fresh water. Sherbet ice is an example of a solid-liquid two-phase fluid. The differential pressure gauge 3 measures the differential pressure between the pressure inside the storage tank 2 (water pressure) and the external pressure (atmospheric pressure). The supply pipe 4 is connected to the storage tank 2, and sherbet ice flows from the storage tank 2 into the supply pipe 4. The supply pipe 4 is, for example, a pipe made of a resin such as vinyl chloride. The supply pipe 4 is an example of the first pipe.

The supply pipe 4 is provided with a supply pump 5, a metal pipe 6, a supply valve 7, and a supply port 8. In the configuration example of the supply system 1 shown in FIG. 1, one end of the supply pipe 4 is connected to the storage tank 2, and the supply port 8 is provided at the other end of the supply pipe 4. A metal pipe 6 is arranged between both ends of the supply pipe 4, and the metal pipe 6 is connected to the supply pipe 4. The metal pipe 6 is a metal pipe. The metal pipe 6 is an example of the second pipe. The present embodiment is not limited to the configuration example of the supply system 1 shown in FIG. 1, and the metal pipe 6 may be connected to the other end of the supply pipe 4 and the metal pipe 6 may be provided with the supply port 8. Seawater resistant surface treatment may be applied to the supply pipe 4 and the metal pipe 6. In FIG. 1, the diameter of the metal pipe 6 is shown to be larger than the diameter of the supply pipe 4, but the diameter of the supply pipe 4 and the diameter of the metal pipe 6 are the same. Sherbet ice or water in which sherbet ice is melted flows through the supply pipe 4 and the metal pipe 6. Sherbet ice and water in which sherbet ice melts are examples of fluids. Melted sherbet ice water includes at least one of fresh water and seawater, or seawater diluted with freshwater. In the following, the sherbet ice flowing through the supply pipe 4 and the metal pipe 6 shall include water in which the sherbet ice has melted.

As shown in FIG. 1, a portion of the supply pipe 4 connected to the storage tank 2 extends in the horizontal direction, and the supply pipe 4 extending in the horizontal direction bends and extends in the vertical direction, and then bends and extends in the horizontal direction. After extending to, it bends and extends in the vertical direction again. In this way, a part of the supply pipe 4 is arranged in the horizontal direction, and a part of the supply pipe 4 is arranged in the vertical direction. Although the supply pump 5 is provided in the supply pipe 4 arranged in the horizontal direction, the supply pump 5 may be provided in the supply pipe 4 arranged in the vertical direction.

When the supply pump 5 is activated and the supply valve 7 is opened, the sherbet ice stored in the storage tank 2 flows in the supply pipe 4 and the metal pipe 6, and the sherbet ice is supplied to the outside from the supply port 8. (Discharged). When the sherbet ice in the storage tank 2 is reduced, the storage tank 2 is replenished with sherbet ice from the ice making device. The supply pump 5 and the supply valve 7 are examples of supply means.

The control device 10 controls the supply pump 5, the supply valve 7, and the purchase billing device 11. Further, the control device 10 controls various devices and devices of the sherbet ice supply device (system). The control device 10 includes a CPU (Central Processing Unit), a memory, an operation unit, a display unit, and the like, and the CPU controls various devices and devices by executing a control program stored in the memory. A PLC (Programmable Logic Controller) may be used as an example of the control device 10.

The supply pump 5 is activated by receiving a start command from the control device 10, and pumps the sherbet ice in the supply pipe 4 to the downstream side (supply port 8 side) of the supply pipe 4. The supply pump 5 is stopped by receiving a stop command from the control device 10, and the pumping of sherbet ice in the supply pipe 4 is stopped. The supply valve 7 is opened by receiving an open command from the control device 10, and is closed by receiving a close command from the control device 10.

The surface thermometer 9 measures the temperature of the sherbet ice flowing through the metal pipe 6 by measuring the surface temperature of the metal pipe 6. In other words, the surface thermometer 9 detects an increase or decrease in the temperature of the sherbet ice flowing through the metal pipe 6. The surface thermometer 9 is an example of a measuring unit. If a thermometer is provided in the supply pipe 4 or the metal pipe 6 to measure the temperature of the sherbet ice, the thermometer will be destroyed by the sherbet ice flowing in the supply pipe 4 and the metal pipe 6. Therefore, the surface thermometer 9 is attached to the surface of the metal pipe 6. Metals have higher thermal conductivity than resins. Therefore, when measuring the temperature of sherbet ice flowing from the surface of the pipe to the inside of the pipe, it is better to attach the surface thermometer 9 to the surface of the metal pipe 6 and to attach the surface thermometer 9 to the surface of the resin supply pipe 4. It is possible to measure the temperature closer to the temperature of the sherbet ice flowing through the measurement point than to attach it. Further, when the surface thermometer 9 is attached to the surface of the metal pipe 6, the temperature of the sherbet ice flowing through the place where the surface thermometer 9 is installed can be immediately detected. For example, when the surface thermometer 9 is installed in the supply pipe 4, if the thermal conductivity of the supply pipe 4 is low, the surface thermometer 9 connects the supply pipe 4 when the temperature of the sherbet ice flowing in the supply pipe 4 changes. There is a time lag before detecting the temperature of the flowing sherbet ice. Therefore, it is preferable to attach the surface thermometer 9 to the surface of the metal pipe 6. Regarding the pipe through which sherbet ice flows, the part where the surface thermometer 9 is installed is the metal pipe 6, and the other part is the supply pipe 4. That is, by making only the part of the pipe through which the sherbet ice flows where the temperature of the sherbet ice is measured made of metal and the other part made of resin, the pipe is cheaper than the whole pipe made of metal. Can be formed. The adhesion between the metal pipe 6 and the surface thermometer 9 may be improved by wrapping a tape having a high thermal conductivity such as a copper tape around the metal pipe 6 and the surface thermometer 9. Further, the adhesion between the metal pipe 6 and the surface thermometer 9 may be improved by sandwiching the adhesive heat conductive silicon between the metal pipe 6 and the surface thermometer 9. By increasing the adhesion between the metal pipe 6 and the surface thermometer 9, the temperature of the metal pipe 6 can be measured more accurately.

For example, when the metal pipe 6 is arranged in the horizontal direction, the sherbet ice flows in the metal pipe 6 in the horizontal direction, so that the ice concentration (IPF) of the sherbet ice in the metal pipe 6 is not constant. Therefore, the temperature differs between the upper part of the metal pipe 6 and the lower part of the metal pipe 6, and the temperature of the metal pipe 6 cannot be measured accurately. As shown in FIG. 1, the metal pipe 6 is arranged in the vertical direction so that the flow direction of the sherbet ice flowing in the metal pipe 6 is the vertical direction. Therefore, the surface thermometer 9 measures the temperature of the metal pipe 6 arranged in the vertical direction. Since the sherbet ice flows vertically in the metal pipe 6, the ice concentration (IPF) of the sherbet ice in the metal pipe 6 becomes constant, and the surface thermometer 9 can accurately measure the temperature of the metal pipe 6. it can.

The temperature of the metal pipe 6 changes according to the temperature of the sherbet ice in the metal pipe 6. The temperature of the metal pipe 6 differs between the case where the sherbet ice in the metal pipe 6 is melted and the case where the sherbet ice in the metal pipe 6 is not melted. Therefore, by measuring the temperature of the metal pipe 6, it is possible to determine whether or not the sherbet ice in the metal pipe 6 is melted. The control device 10 starts measuring the supply amount of sherbet ice supplied to the outside according to the temperature measured by the surface thermometer 9. The control device 10 is an example of a measuring unit.

The control device 10 acquires the value of the water pressure applied to the storage tank 2 and the value of the atmospheric pressure from the differential pressure gauge 3. The control device 10 calculates the remaining amount of sherbet ice in the storage tank 2 from the difference between the value of the water pressure applied to the storage tank 2 and the value of the atmospheric pressure. In the control device 10, the difference between the remaining amount (mass) of sherbet ice in the storage tank 2 at the start of measuring the supply amount of sherbet ice and the remaining amount (mass) of sherbet ice in the storage tank 2 at an arbitrary time point. The supply amount (mass) of sherbet ice is calculated based on.

The purchase billing device 11 includes an operation unit, a recording unit, a display unit, and the like. The purchase billing device 11 receives the purchase amount (requested amount) of sherbet ice from the purchaser of sherbet ice (hereinafter referred to as “purchaser”), and transmits (transmits) the purchase amount of sherbet ice to the control device 10. ). The amount of sherbet ice purchased is the mass of sherbet ice purchased by the purchaser. The purchase charging device 11 receives the supply amount of sherbet ice from the control device 10 and records the supply amount of sherbet ice in the recording unit inside the purchase charging device 11. The purchase charging device 11 charges the purchaser according to the purchase amount or the supply amount of the purchaser's sherbet ice. The purchaser pays coins, banknotes, or other coins, or a non-contact IC card, prepaid card, credit card, or the like, depending on the purchase amount or supply amount of sherbet ice. The purchase billing device 11 is an example of a billing unit.

As shown in FIG. 1, a portion of the supply pipe 4 connected to the storage tank 2 extends in the horizontal direction, and the supply pipe 4 extending in the horizontal direction bends and extends in the vertical direction, and then bends and extends in the horizontal direction. After extending to, it bends and extends in the vertical direction again. In this way, a part of the supply pipe 4 is arranged in the horizontal direction, and a part of the supply pipe 4 is arranged in the vertical direction. Although the supply pump 5 is provided in the supply pipe 4 arranged in the horizontal direction, the supply pump 5 may be provided in the supply pipe 4 arranged in the vertical direction.

For example, when the metal pipe 6 is arranged in the horizontal direction, the sherbet ice flows in the metal pipe 6 in the horizontal direction, so that the distribution of the ice concentration (IPF) of the sherbet ice in the metal pipe 6 is not constant. Therefore, the temperature differs between the upper part of the metal pipe 6 and the lower part of the metal pipe 6, and the temperature of the metal pipe 6 cannot be measured accurately. As shown in FIG. 1, the metal pipe 6 is arranged in the vertical direction so that the flow direction of the sherbet ice flowing in the metal pipe 6 is the vertical direction. Therefore, the surface thermometer 9 measures the temperature of the metal pipe 6 arranged in the vertical direction. Since the sherbet ice flows vertically in the metal pipe 6, the distribution of the ice concentration (IPF) of the sherbet ice in the metal pipe 6 becomes constant, and the surface thermometer 9 accurately measures the temperature of the metal pipe 6. be able to.

<Operation>
Next, the operation of the sherbet ice supply system 1 according to the embodiment will be described. FIG. 2 is a diagram showing an operation flow of the sherbet ice supply system 1 according to the embodiment.

In step S1, the purchaser operates the operation unit of the purchase billing device 11 to select the purchase amount of sherbet ice. The operation unit of the purchase billing device 11 receives an operation instruction from the purchaser. For example, the purchase amount of sherbet ice may be selected by the purchaser inputting a numerical value into the operation unit of the purchase charging device 11. For example, the purchase amount of sherbet ice may be selected by selecting the option of the operation unit of the purchase charging device 11 by the purchaser.

The operation unit of the purchase billing device 11 may be a touch panel. The purchase amount of sherbet ice may be selected by the purchaser touching the touch panel and selecting display items such as icons displayed on the display arranged so as to overlap the touch panel. The purchase amount of sherbet ice may be selected by the purchaser touching the touch panel and inputting a numerical value into the touch panel. The operation unit of the purchase billing device 11 may be an input button or a selection button. The purchase amount of sherbet ice may be selected by the purchaser by inputting a numerical value using the input button. The purchase amount of sherbet ice may be selected by the purchaser selecting a numerical value using the selection button.

Further, in step S1, the purchase charging device 11 transmits the purchased amount of sherbet ice to the control device 10. The transmission method may be an analog signal such as DC4 to 20 mmA, or a pulse signal. For example, the purchase amount of sherbet ice per pulse may be set in advance in the purchase charging device 11, and then a pulse corresponding to the purchase amount of sherbet ice may be transmitted from the purchase charging device 11 to the control device 10.

In step S2, the control device 10 compares the purchased amount of sherbet ice transmitted from the purchase charging device 11 with the remaining amount of sherbet ice in the storage tank 2, and the remaining amount of sherbet ice in the storage tank 2 is sherbet. Determine if it is more than the amount of ice purchased. When the remaining amount of sherbet ice in the storage tank 2 is equal to or greater than the purchased amount of sherbet ice (step S2: YES), the flow process proceeds to step S3.

On the other hand, when the remaining amount of sherbet ice in the storage tank 2 is less than the purchased amount of sherbet ice (step S2: NO), the flow processing returns to step S1. In this case, the control device 10 transmits a signal that the sherbet ice cannot be supplied to the purchase charging device 11. The purchase billing device 11 displays a message on the display unit indicating that the sherbet ice cannot be supplied. The purchase billing device 11 may display the remaining amount of sherbet ice in the storage tank 2 on the display unit. In step S1, the purchaser can check the remaining amount of sherbet ice in the storage tank 2 and select the purchase amount of sherbet ice. Further, after the storage tank 2 is replenished with sherbet ice from the ice making device, the flow processing may return to step S1.

<Calculation of the remaining amount of sherbet ice>
The high pressure detection part of the differential pressure gauge 3 is connected to the bottom (bottom) of the storage tank 2, and the low pressure detection part of the differential pressure gauge 3 is open to the atmosphere. The water pressure P applied to the bottom of the storage tank 2 is P = from the water level h of the storage tank 2, the density ρ of water (seawater), the gravity acceleration g (= 9.81 [m / s ² ]), and the atmospheric pressure Pa. It can be obtained by ρ ・ g ・ h + Pa. Therefore, the water level h of the storage tank 2 can be obtained by measuring the differential pressure between the water pressure P and the atmospheric pressure Pa. The amount of water in the storage tank 2 (= remaining amount of sherbet ice G _Si ) at an arbitrary time point is determined from the water level h of the storage tank 2, the inner cross-sectional area At of the storage tank 2 and the density ρsi of sherbet ice, and G _Si = h · At.・ Obtained by ρsi. The control device 10 acquires the differential pressure between the water pressure P and the atmospheric pressure Pa from the differential pressure gauge 3, and calculates the remaining amount G _{Si of} sherbet ice. In order to prevent the high pressure detection portion of the differential pressure gauge 3 from being clogged with sherbet ice, a mesh-like member may be provided around the high pressure detection portion of the differential pressure gauge 3. In the above description, the case where the storage tank 2 is an open tank has been described, but the storage tank 2 according to the embodiment may be a closed tank, and the remaining amount of sherbet ice is calculated by another method. May be good.

In step S3, the control device 10 transmits a signal that sherbet ice can be supplied to the purchase charging device 11. The purchase billing device 11 displays a message on the display unit indicating that sherbet ice can be supplied. Further, in step S3, the control device 10 transmits a signal of an open command to the supply valve 7 and a signal of a start command to the supply pump 5. As a result, the supply valve 7 is opened, the supply pump 5 is activated, and the supply of sherbet ice is started.

In step S4, the control device 10 determines whether or not the temperature T (hereinafter, referred to as “measurement temperature T”) measured by the surface thermometer 9 is lower than the predetermined temperature Ts. When the measurement temperature T is lower than the predetermined temperature Ts (step S4: YES), the flow process proceeds to step S5. On the other hand, when the measurement temperature T is equal to or higher than the predetermined temperature Ts (step S4: NO), the process of step S4 is performed again. The control device 10 may acquire the measurement temperature T from the surface thermometer 9 and determine whether or not the measurement temperature T is lower than the predetermined temperature Ts. Further, the control device 10 may monitor the measurement temperature T and determine whether or not the measurement temperature T is lower than the predetermined temperature Ts.

<Judgment of conditions for starting measurement of sherbet ice supply>
When the supply of sherbet ice is started, the supply pipe 4 is not always filled with sherbet ice. For example, if the sherbet ice is not supplied for a long time, the sherbet ice in the supply pipe 4 melts and turns into water. Therefore, it is necessary to start measuring the supply amount of sherbet ice after detecting that the water in the supply pipe 4 has been replaced by the sherbet ice in the storage tank 2. In the supply system 1 according to the embodiment, the metal pipe 6 is installed on the upstream side or the downstream side (upstream side in FIG. 1) of the supply valve 7, and the surface thermometer 9 is attached to the surface of the metal pipe 6. .. After the supply of sherbet ice is started, when the measured temperature T is a temperature lower than the predetermined temperature T _S, water melted in the supply pipe 4 is determined to have been substituted with sherbet ice, sherbet ice from that point The measurement of the supply amount of ice cubes is started.

As described above, after the supply of sherbet ice was initiated, the measured temperature T starts measuring the supply amount of sherbet ice from the time at a temperature lower than the predetermined temperature T _S. When the distance between the metal pipe 6 and the supply port 8 is large, water may be supplied to the outside from the supply port 8 for a while after the measurement of the supply amount of sherbet ice is started. On the other hand, when the distance between the metal pipe 6 and the supply port 8 is small, sherbet ice is supplied from the supply port 8 immediately after the measurement of the supply amount of sherbet ice is started. Therefore, it is preferable that the metal pipe 6 is arranged in the vicinity of the supply port 8. Further, the metal pipe 6 may be arranged on either the upstream side or the downstream side of the supply pump 5.

The predetermined temperature T _S in order to vary the salinity of the ice making raw water ice concentration (IPF) and sherbet ice sherbet ice, is calculated using the following equations (1) 3.
T _S = T _SI + C ... (Equation 1)
^{_{T SI = -0.131 × (C f}} ) 2 -0.5418 × C f ··· ( Equation 2)
C _f = ( _CO / 100) / (1-IPF / 100) ... (Equation 3)
T _SI : Actual temperature of sherbet ice (freezing temperature) [° C]
C _f : Salinity of sherbet ice [%]
_CO : Salinity [%] of raw ice making of sherbet ice
IPF: Ice concentration of sherbet ice [%]
C: Constant [° C] determined by test run adjustment

The constant (C) determined by the trial run adjustment is a value determined by the adjustment when the supply system 1 is commissioned. For example, the measured temperature T may be higher than the temperature of the sherbet ice in the metal pipe 6 due to factors such as the thermal conductivity of the metal pipe 6 and the degree of adhesion between the metal pipe 6 and the surface thermometer 9. Therefore, a constant (C) determined by the test run adjustment is added to the actual temperature ( _TSI ) of the sherbet ice. Here, using the equations 1 to 3 has been described an example of calculating the predetermined temperature T _S, the predetermined temperature T _S may be calculated by other methods.

<Measuring method of supplying sherbet ice>
In the supply system 1 according to the embodiment, the supply amount of sherbet ice supplied to the outside is measured by detecting the change in the water level of the storage tank 2. The water level h of the storage tank 2 can be obtained by measuring the differential pressure between the water pressure P and the atmospheric pressure Pa as described above. Further, the amount of water in the storage tank 2 (= remaining amount of sherbet ice G _Si ) at an arbitrary time point is determined from the water level h of the storage tank 2, the internal cross-sectional area At of the storage tank 2 and the density ρsi of sherbet ice, and G _Si = h. -It can be obtained by At · ρsi. The control device 10 stores the remaining amount of sherbet ice ( _GSi-0 ) at the time when the measurement of the supply amount of sherbet ice is started in the memory. The amount of sherbet ice supplied (ΔG _Si ) during the supply of sherbet ice is obtained by subtracting the remaining amount of sherbet ice (G _Si ) from G _{Si-0 at an} arbitrary time point. Further, the supply amount of sherbet ice supplied to the outside may be measured by using an electromagnetic flow meter or a positive displacement flow meter capable of measuring the flow rate of the solid-liquid two-phase fluid.

In step S5, the control device 10 starts measuring the supply amount of sherbet ice. In step S6, the control device 10 determines whether or not the supply amount of sherbet ice is equal to or greater than the purchase amount of sherbet ice. When the supply amount of sherbet ice is equal to or greater than the purchase amount of sherbet ice (step S6: YES), the flow process proceeds to step S7. On the other hand, when the supply amount of sherbet ice is less than the purchase amount of sherbet ice (step S6: NO), the process of step S6 is performed again.

In step S7, the control device 10 transmits a closing command signal to the supply valve 7 and a stop command signal to the supply pump 5. As a result, the supply valve 7 is closed, the supply pump 5 is stopped, and the supply of sherbet ice to the outside is completed. Further, in step S7, the control device 10 transmits a signal of normal end regarding the supply of sherbet ice and the supply amount of sherbet ice to the purchase charging device 11.

In step S8, the purchase billing device 11 records the supply amount of sherbet ice and the purchase information in the internal recording unit of the purchase billing device 11. The purchase information includes information such as the purchaser's name, name, and purchase date and time. Further, in step S8, the purchase charging device 11 may display a message on the display unit indicating that the supply of sherbet ice has ended.

When the supply of sherbet ice is completed, the purchase charging device 11 charges the purchaser according to the purchase amount or supply amount of sherbet ice. Further, in step S3, the purchase charging device 11 may charge the purchaser according to the purchase amount of the sherbet ice before the supply of the sherbet ice is started. In this case, the purchase charging device 11 may transmit a charging completion signal for the purchased amount of sherbet ice to the control device 10. When the control device 10 receives the signal of the completion of charging for the purchase amount of sherbet ice, the control device 10 may start supplying the sherbet ice.

Supply system 1 according to the embodiment, after the supply of sherbet ice is started, when the measured temperature T is a temperature lower than the predetermined temperature T _S, starts measuring the supply amount of sherbet ice. If the measured temperature T is a temperature lower than the predetermined temperature T _S, water melted in the supply pipe 4 is substituted with sherbet ice. Therefore, when the measured temperature T is a temperature lower than the predetermined temperature T _S, by starting the measurement of the amount of supply of sherbet ice, include the amount of melted water supply pipe 4 to the supply amount of sherbet ice Is avoided. As described above, according to the supply system 1 according to the embodiment, the accuracy of measuring the supply amount of sherbet ice can be improved. As a result, when supplying and selling sherbet ice, the supply amount of sherbet ice can be accurately measured, and the amount of sherbet ice equal to the purchaser's request can be supplied.

A heat insulating material may be provided so as to cover the metal pipe 6 and the surface thermometer 9. By covering the metal pipe 6 and the surface thermometer 9 with the heat insulating material, the metal pipe 6 and the surface thermometer 9 can be prevented from being affected by the outside air temperature. Therefore, the surface thermometer 9 can measure the temperature of the metal pipe 6 more accurately. However, when the heat insulating material covers the metal pipe 6 and the surface thermometer 9, the sherbet ice in the supply pipe 4 is melted when the supply of sherbet ice is started, but the sherbet ice in the metal pipe 6 is melted. May not melt. In this case, after measuring the temperature T due to the influence of sherbet ice not melt in the metal pipe 6 is lower than the predetermined temperature T _S, the measured temperature T due to the influence of the melting water in the supply pipe 4 is higher than the predetermined temperature T _S It gets higher. Therefore, when the measured temperature T due to the influence of sherbet ice not melt in the metal pipe 6 starts measuring the supply amount of sherbet ice when it becomes lower than the predetermined temperature T _S, the supply amount of sherbet ice can not be accurately measured .. In the supply system 1 according to the embodiment, the control device 10 starts measuring the supply amount of sherbet ice based on the following measurement start conditions 1 and 2.

<Measurement start condition 1>
After a predetermined time the supply of sherbet ice to the outside from the start, if the measured temperature T is a temperature lower than the predetermined temperature T _S, controller 10, a measurement of the amount of supply of sherbet ice is supplied to the outside Start.

As a predetermined time elapses from the start of the supply of sherbet ice, the sherbet ice in the metal pipe 6 remaining before the start of the supply of sherbet ice is supplied to the outside from the supply port 8 (in other words,). , Set a predetermined time so that all the sherbet ice remaining in the metal pipe 6 can flow out from the metal pipe 6 (for example, about 1 to 5 seconds). After the supply of sherbet ice starts after a predetermined time has elapsed, when the measured temperature T is a temperature lower than the predetermined temperature T _S, water melted in the supply pipe 4 is determined to have been substituted with sherbet ice, its From that point, start measuring the supply of sherbet ice. In this way, the measurement of the sherbet ice supply amount can be started without being affected by the sherbet ice in the metal pipe 6 that has remained before the sherbet ice supply is started.

In the case of the measurement start condition 1, in step S4, the control device 10 acquires the measurement temperature T from the surface thermometer 9 after a lapse of a predetermined time from the start of the supply of sherbet ice, and the measurement temperature T is from the predetermined temperature Ts. It may be determined whether or not the temperature is low. Further, in step S4, the control device 10 monitors the measurement temperature T and determines whether or not the measurement temperature T is lower than the predetermined temperature Ts after a lapse of a predetermined time from the start of the supply of sherbet ice. You may. The predetermined time may be determined by adjustment when the supply system 1 is commissioned, or may be determined based on the length of the metal pipe 6, the driving amount of the supply pump 5, the flow rate of sherbet ice, and the like.

<Measurement start condition 2>
After the supply of sherbet ice was initiated, the measured temperature T is a temperature lower than the predetermined temperature T _S, and the subsequently measured temperature T is equal to or higher than a predetermined temperature T _S, it is lower than the predetermined temperature T _S subsequently measured temperature T In the case of temperature, the control device 10 starts measuring the supply amount of sherbet ice.

If sherbet ice is not melted before the supply of sherbet ice begins to metallic pipe 6 has remained, the measured temperature T of the time the supply of sherbet ice has started is at a temperature lower than the predetermined temperature T _S .. When the sherbet ice supply is started, the sherbet ice in the metal pipe 6 remaining before the sherbet ice supply is started is supplied to the outside from the supply port 8 and the melted water in the supply pipe 4 is supplied. Flows in the metal pipe 6. Therefore, measuring the temperature T increases from a temperature lower than the predetermined temperature T _S above a predetermined temperature T _S. When the subsequent measured temperature T is lower than the predetermined temperature T _S, water melted in the supply pipe 4 is determined to have been substituted with sherbet ice, it starts measuring the supply amount of sherbet ice from that point. In this way, the measurement of the sherbet ice supply amount can be started without being affected by the sherbet ice in the metal pipe 6 that has remained before the sherbet ice supply is started.

If the measurement start condition 2, in step S4, the control unit 10, the measured temperature T from a surface thermometer 9 acquired at predetermined intervals, the measured temperature T is a temperature lower than the predetermined temperature T _S, thereafter the measured temperature T There are equal to or higher than the predetermined temperature T _S, thereafter the measured temperature T may be determined whether the temperature lower than the predetermined temperature T _S. Further, in step S4, the control unit 10 monitors the measured temperature T, the measured temperature T is a temperature lower than the predetermined temperature T _S, and the subsequently measured temperature T is equal to or higher than a predetermined temperature T _S, thereafter the measured temperature T may also be determined whether the temperature lower than the predetermined temperature T _S.

The supply system 1 according to the embodiment can also be specified as a supply method. Further, in the supply system 1 according to the embodiment, the case of supplying sherbet ice has been described, but the supply system 1 according to the embodiment can be applied not only to the sherbet ice but also to the case of supplying other fluids. Is. For example, the supply system 1 according to the embodiment can be applied to supply a solid-liquid two-phase fluid whose temperature changes depending on the concentration of a solid.

In the supply system 1 according to the embodiment, the supply pipe 4 may be made of metal. That is, the supply pipe 4 may be a metal pipe. In this case, the supply pipe 4 and the metal pipe 6 may be integrated by forming the supply pipe 4 and the metal pipe 6 with the same type of metal material. Further, the supply pipe 4 and the metal pipe 6 may be formed of different types of metal materials. For example, the metal materials of the supply pipe 4 and the metal pipe 6 may be selected so that the thermal conductivity of the metal pipe 6 is higher than the thermal conductivity of the supply pipe 4.

In the supply system 1 according to the embodiment, the supply pump 5 may not be provided in the supply pipe 4. For example, by installing the storage tank 2 at a position higher than the supply port 8, the supply valve 7 is opened, so that the sherbet ice stored in the storage tank 2 is in the supply pipe 4 and in the metal pipe 6. Sherbet ice is supplied to the outside from the supply port 8. The supply pump 5 is an example of a supply means.

1 Supply system 2 Storage tank 3 Differential pressure gauge 4 Supply pipe 5 Supply pump 6 Metal pipe 7 Supply valve 8 Supply port 9 Surface thermometer 10 Control device 11 Purchase billing device

Claims (7)

A storage tank for storing solid-liquid two-phase fluid,
A pipe connected to the storage tank and into which the solid-liquid two-phase fluid flows from the storage tank,
A measuring unit that measures the temperature of the fluid flowing through the pipe,
A supply means for supplying the solid-liquid two-phase fluid in the pipe to the outside,
When the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started, the amount of the solid-liquid two-phase fluid supplied to the outside is measured. Equipped with a measuring unit to start,
Supply system. At least a part of the pipe is arranged in the vertical direction.
The measuring unit measures the temperature of the fluid flowing through the pipe arranged in the vertical direction.
The supply system according to claim 1. The pipe has a first pipe and a second metal pipe.
The first pipe is connected to the storage tank,
The second pipe is connected to the first pipe,
The measuring unit measures the temperature of the fluid flowing through the pipe by measuring the surface temperature of the second pipe.
The supply system according to claim 1 or 2. A heat insulating material covering the second pipe and the measuring portion is provided.
When the measuring unit detects a temperature lower than the predetermined temperature after a lapse of a predetermined time from the start of supplying the solid-liquid two-phase fluid to the outside, the measuring unit supplies the solid to the outside. Start measuring the supply amount of liquid two-phase fluid,
The supply system according to claim 3. A heat insulating material covering the second pipe and the measuring portion is provided.
After the solid-liquid two-phase fluid is started to be supplied to the outside, the measuring unit detects a temperature lower than the predetermined temperature, and then the measuring unit measures a temperature equal to or higher than the predetermined temperature. When the measurement unit detects a temperature lower than the predetermined temperature after the detection, the measurement of the supply amount of the solid-liquid two-phase fluid supplied to the outside is started.
The supply system according to claim 3. A storage tank for storing the solid-liquid two-phase fluid, a pipe connected to the storage tank and into which the solid-liquid two-phase fluid flows from the storage tank, and a measuring unit for measuring the temperature of the fluid flowing through the pipe. It is a supply method in the supply system provided
A supply step for supplying the solid-liquid two-phase fluid in the pipe to the outside,
When the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started, the amount of the solid-liquid two-phase fluid supplied to the outside is measured. The measurement step to start and
Supply method including. A storage tank for storing solid-liquid two-phase fluid,
A pipe connected to the storage tank and into which the solid-liquid two-phase fluid flows from the storage tank,
A measuring unit that measures the temperature of the fluid flowing through the pipe,
A supply means for supplying the solid-liquid two-phase fluid in the pipe to the outside,
When the measuring unit detects a temperature lower than a predetermined temperature after the supply of the solid-liquid two-phase fluid to the outside is started, the amount of the solid-liquid two-phase fluid supplied to the outside is measured. The measuring unit to start and
A charging unit that charges according to the supply amount of the solid-liquid two-phase fluid,
A billing device equipped with.

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